Primary Driven Gear 62 teeth,

With the DRT 62 teeth primary drive cog, it is possible to extend the gearbox of a Vespa 150 GS/GS 3 tuned with QUATTRINI 177 M1XL without any fuss. If not, the short GS gear is not able to turn the power into speed. With the DRT 62 teeth extremely tall transmission are possible for all 80-200cc models. The strong setups of the current engines mean these transmissions are necessary.

Note: On both of the primary drive cogs a large 115/108mm PX200 clutch, the appropriate straight-toothed DRT clutch gear cog and the primary repair kit 16069400 are all necessary.